Question:
Wavefront for a point source, near it, is:
Wavefront for a point source, near it, is:
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A point source always produces spherical wavefronts because light spreads uniformly in all directions from the source.
Updated On: May 27, 2026
- Plane
- Spherical
- Cylindrical
- None of the above
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The Correct Option is B
Solution and Explanation
Concept:
A wavefront is defined as the locus of all particles of a medium vibrating in the same phase.
Depending upon the nature and position of the source, different types of wavefronts are produced:
Step 1: Understand the nature of a point source.
A point source is a very small source of light that emits light equally in all directions. As the light propagates outward from the source, every point at equal distance from the source forms a surface. That surface is spherical in shape.
Step 2: Identify the shape of the wavefront near the source.
Near the point source, curvature of the wavefront is clearly visible. Thus, the wavefront remains spherical. \[ \boxed{\text{Wavefront is spherical}} \]
Step 3: Why other options are incorrect.
- Spherical wavefront
- Plane wavefront
- Cylindrical wavefront
Step 1: Understand the nature of a point source.
A point source is a very small source of light that emits light equally in all directions. As the light propagates outward from the source, every point at equal distance from the source forms a surface. That surface is spherical in shape.
Step 2: Identify the shape of the wavefront near the source.
Near the point source, curvature of the wavefront is clearly visible. Thus, the wavefront remains spherical. \[ \boxed{\text{Wavefront is spherical}} \]
Step 3: Why other options are incorrect.
- Plane Wavefront: Produced when the source is very far away.
- Cylindrical Wavefront: Produced by a linear source.
- None of the above: Incorrect because spherical wavefront is correct.
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